1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkParametricDini.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkParametricDini - Generate Dini's surface.
// .SECTION Description
// vtkParametricDini generates Dini's surface.
// Dini's surface is a surface that posesses constant negative
// Gaussian curvature
//
// For further information about this surface, please consult the
// technical description "Parametric surfaces" in http://www.vtk.org/documents.php
// in the "VTK Technical Documents" section in the VTk.org web pages.
//
// .SECTION Thanks
// Andrew Maclean a.maclean@cas.edu.au for
// creating and contributing the class.
//
#ifndef __vtkParametricDini_h
#define __vtkParametricDini_h
#include "vtkParametricFunction.h"
class VTK_COMMON_EXPORT vtkParametricDini : public vtkParametricFunction
{
public:
vtkTypeMacro(vtkParametricDini,vtkParametricFunction);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct Dini's surface with the following parameters:
// MinimumU = 0, MaximumU = 4*Pi,
// MinimumV = 0.001, MaximumV = 2,
// JoinU = 0, JoinV = 0,
// TwistU = 0, TwistV = 0,
// ClockwiseOrdering = 1,
// DerivativesAvailable = 1
// A = 1, B = 0.2
static vtkParametricDini *New();
// Description
// Return the parametric dimension of the class.
virtual int GetDimension() {return 2;}
// Description:
// Set/Get the scale factor.
// Default = 1.
vtkSetMacro(A,double);
vtkGetMacro(A,double);
// Description:
// Set/Get the scale factor.
// Default = 0.2
vtkSetMacro(B,double);
vtkGetMacro(B,double);
// Description:
// Dini's surface.
//
// This function performs the mapping \f$f(u,v) \rightarrow (x,y,x)\f$, returning it
// as Pt. It also returns the partial derivatives Du and Dv.
// \f$Pt = (x, y, z), Du = (dx/du, dy/du, dz/du), Dv = (dx/dv, dy/dv, dz/dv)\f$ .
// Then the normal is \f$N = Du X Dv\f$ .
virtual void Evaluate(double uvw[3], double Pt[3], double Duvw[9]);
// Description:
// Calculate a user defined scalar using one or all of uvw, Pt, Duvw.
//
// uvw are the parameters with Pt being the the cartesian point,
// Duvw are the derivatives of this point with respect to u, v and w.
// Pt, Duvw are obtained from Evaluate().
//
// This function is only called if the ScalarMode has the value
// vtkParametricFunctionSource::SCALAR_FUNCTION_DEFINED
//
// If the user does not need to calculate a scalar, then the
// instantiated function should return zero.
//
virtual double EvaluateScalar(double uvw[3], double Pt[3], double Duvw[9]);
protected:
vtkParametricDini();
~vtkParametricDini();
// Variables
double A;
double B;
private:
vtkParametricDini(const vtkParametricDini&); // Not implemented.
void operator=(const vtkParametricDini&); // Not implemented.
};
#endif
|
